Square Miles to Acres Converter
Convert square miles (mi²) to acres (ac)
Result
640 ac
Acres
1 mi² = 640 ac
1 mi² in other units
- 1Enter a valueType the number to convert
- 2Pick the unitsChoose what to convert from and to
- 3Read the resultSee it in every other unit too
How to convert square miles to acres
One square mile equals 640 acres, so multiply the number of square miles by 640.
ac = mi² × 640
1 mi² = 640 ac · 1 ac = 0.0015625 mi²
Worked example
To convert 5 square miles to acres: 5 mi² × 640 = 3,200 ac.
About square miles (mi²)
A square mile is 640 acres, about 2.59 km².
About acres (ac)
An acre is 43,560 square feet (about 4,047 m²). Agricultural land in India is commonly measured in acres.
More conversions
Square Miles to other units
Frequently asked questions
How many acres are in one square mile?
One square mile equals 640 acres.
How many square miles are in one acre?
One acre equals 0.0015625 square miles.
How do I convert square miles to acres?
Use the formula ac = mi² × 640. For example, 5 mi² × 640 = 3,200 ac.